Goodwill (Details) $ in Thousands	9 Months Ended
Sep. 30, 2016 USD ($)
Goodwill by Segment
Balances at December 31, 2015	$ 217,722
Re-allocation of goodwill	0
Acquisition	300
Disposals	(101)
Balances at September 30, 2016	217,921
Title
Goodwill by Segment
Balances at December 31, 2015	208,873
Re-allocation of goodwill	2,382
Acquisition	300
Disposals	(101)
Balances at September 30, 2016	211,454
Ancillary Services and Corporate
Goodwill by Segment
Balances at December 31, 2015	8,849
Re-allocation of goodwill	(2,382)
Acquisition	0
Disposals	0
Balances at September 30, 2016	$ 6,467

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=64834752&loc=SL49117168-202975

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- Definition

Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

+ References

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

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- Definition

Amount of transfers into (out of) an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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- Definition

Amount of divestiture of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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